JPH05255952A - Pilot valve fitting structure - Google Patents

Abstract

PURPOSE:To maintain the comfortable working environment in a driver's cab and prevent the reduction of operability. CONSTITUTION:This fitting structure is arranged with a heat insulating material 16 at least on the pilot valve fitting section 10b of a console box 10 installed in the driver's cab 1 of a hydraulic working machine, and the heat insulating material 16 and a pilot valve 11 are fastened together with bolts 1. When the pilot valve 11 is heated by the operating oil, the heat is prevented from being transferred to the console box 10 by the heat insulating material 16, and the rise of the atmospheric temperature outside the console box 10 is suppressed. The temperature rise in the driver's cab 1 can be suppressed, the comfortable working environment can be maintained, switches arranged on the console box 10 can be easily operated, and the reduction of operability can be prevented. The temperature rise in the driver's cab 1 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pilot valve mounting structure applied when a pilot valve is arranged in a console box installed in a driver's cab of a hydraulic working machine such as a hydraulic shovel or a hydraulic crane.

[0002]

2. Description of the Related Art As shown in FIG. 3, as means for operating a hydraulically operated control valve (not shown) for traveling, turning, front control, etc. of a hydraulic shovel, a hydraulic crane, etc.
A pilot valve 11 in which an operating lever 12 is operated by an operator 3 in the cab 1 is screwed into a flange 11a of the pilot valve 11 in a console box 10 made of steel plate installed on the floor plate 2 as shown in FIG. It is directly attached by bolts 15 or the like.

[0003]

As described above, conventionally, since the pilot valve 11 was directly attached to the console box 10, the pilot oil flowing through the pilot pipe line 5 between the pilot valve 11 and the control valve was removed. Heat from the pilot valve 11 to the console box 10
And the ambient temperature outside the console box 10, that is, the indoor temperature of the driver's cab 1 is raised, the work environment in the driver's cab is deteriorated.

Further, since the heat of the pilot valve 11 is transferred to the console box 10, the console box 1
The switches 13 arranged at 0 (switches for switching the work mode (heavy work / light work), wiper switches for wiper operation, light switches for lighting the lights, etc.) arranged at 0 become hot. However, there is a problem in that the meters 14 attached to the console box 10 may be adversely affected.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a pilot valve mounting structure for maintaining a comfortable working environment in a driver's cab and preventing deterioration in operability. To do.

[0006]

In order to achieve the above object, the present invention provides a pilot valve mounting structure applied when a pilot valve is arranged in a console box installed in a driver's cab of a hydraulic working machine. The pilot valve is attached with a heat insulating material interposed at least on the back surface side of the front and back surfaces of the pilot valve mounting portion in the console box.

[0007]

According to the pilot valve mounting structure thus constructed, the heat of the pilot valve is prevented from being transferred to the console box by the heat insulating material, and the temperature rise of the console box is suppressed.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of a pilot valve mounting structure of the present invention, and FIG. 2 is a sectional view of its essential part. The console box 10 is made of steel plate and has a pilot valve 11
It has a pilot valve mounting portion 10b having a mounting hole 10a for mounting.

The pilot valve 11 has a flange 11
The flange 11a has a plurality of screw holes 11b for attaching the pilot valve 11 to the console box 10.

As shown in FIG. 2, the mounting structure of the pilot valve 11 to the console box 10 is such that the pilot valve mounting part 10b and the pilot valve mounting part 10b are provided on both sides (front side and back side) of the pilot valve mounting part 10b of the console box 10. In order to prevent the flange 11a of 11 and the pilot valve mounting portion 10b from coming into direct contact with the bolt 15, one heat insulating material 16 is arranged on each of the front and back sides, and the heat insulating material 16 and the pilot valve 11 are fastened together by the bolt 15. .

The heat insulating material 16 is made of, for example, phenolic resin, has a ring shape having a diameter substantially the same as the diameter of the flange 11a, and has an opening 16a for inserting the bolt 15 at a position corresponding to the position of the screw hole 11b. It is provided.

By thus disposing the heat insulating material 16 on the front and back surfaces of the pilot valve mounting portion 10b, it is possible to prevent heat transfer from the pilot valve 11 to the console box 10.

According to the pilot valve mounting structure of the above-described embodiment, the heat transfer to the console box 10 is suppressed by the heat insulating material 16 even if the pilot valve 10 generates heat due to hydraulic oil, so that the following effects are obtained. can get. (1) The switches 13, the meters 14, and other electric parts attached to the console box 10 can be thermally protected. (2) The heat transfer to the switches 13 attached to the console box 10 is reduced, and as a result, it is not difficult to operate the switches 13 and the operability is improved. (3) Since it is possible to suppress an increase in ambient temperature outside the console box 10, it is possible to suppress an increase in temperature inside the driver's cab and maintain a comfortable working environment in the driver's cab.

The present invention is not limited to the above embodiment,
Various kinds of deformations are possible, and the heat insulating material 16 is, for example, a ring shape having a diameter slightly larger than the diameter of the bolt 15, and the same number of the heat insulating material 16 as the number of the bolts 15 is arranged at the position where the bolts 15 are tightened. Good. Also, heat insulation material 1
6 may be arranged only on the back side having a greater heat transfer preventing effect than the front side of the pilot valve mounting portion 10b. When the heat insulating material 16 is attached only to the back surface of the mounting portion 10b, heat is transferred from the front surface side to the console box 10 via the bolts 15. The heat area becomes small, and the effect of preventing the temperature rise of the console box 10 is enhanced.

[0015]

As described above, according to the present invention, the heat of the pilot valve can be prevented from being transferred to the console box by the heat insulating material, and the temperature rise in the operator's cab outside the console box can be suppressed. It is possible to maintain a comfortable working environment in the cab. Further, it is possible to prevent the operability of the switches from being lowered and prevent the meters from being adversely affected.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a pilot valve mounting structure of the present invention.

FIG. 2 is a cross-sectional view of essential parts of the pilot valve mounting structure shown in FIG.

FIG. 3 is a side view showing a driver's cab of the hydraulic working machine.

FIG. 4 is a sectional view showing a conventional pilot valve mounting structure.

[Explanation of symbols]

 1 Operator's cab 10 Console box 10b Pilot valve mounting part 11 Pilot valve 13 Switches 14 Meters 15 Bolt 16 Insulating material

Claims (1)

[Claims] 1. A pilot valve mounting structure applied when a pilot valve is arranged in a console box installed in a driver's cab of a hydraulic working machine, wherein at least a back surface of a front surface and a back surface of a pilot valve mounting portion of the console box. A pilot valve mounting structure in which the pilot valve is mounted with a heat insulating material interposed therebetween.